Reduce FOR_EACH_OBSERVER usage in extensions

extensions/components/native_app_window/native_app_window_views.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/components/native_app_window/native_app_window_views.h"
 
 #include "base/threading/sequenced_worker_pool.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ skipping 176 matching lines @@
 void NativeAppWindowViews::AddObserver(
     web_modal::ModalDialogHostObserver* observer) {
   observer_list_.AddObserver(observer);
 }
 void NativeAppWindowViews::RemoveObserver(
     web_modal::ModalDialogHostObserver* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
 void NativeAppWindowViews::OnViewWasResized() {
-  FOR_EACH_OBSERVER(web_modal::ModalDialogHostObserver,
-                    observer_list_,
-                    OnPositionRequiresUpdate());
+  for (auto& observer : observer_list_)
+    observer.OnPositionRequiresUpdate();
 }
 
 // WidgetDelegate implementation.
 
 void NativeAppWindowViews::OnWidgetMove() {
   app_window_->OnNativeWindowChanged();
 }
 
 views::View* NativeAppWindowViews::GetInitiallyFocusedView() {
   return web_view_;
@@ skipping 55 matching lines @@
            !draggable_region_->contains(location.x(), location.y());
   }
 #endif
 
   return true;
 }
 
 // WidgetObserver implementation.
 
 void NativeAppWindowViews::OnWidgetDestroying(views::Widget* widget) {
-  FOR_EACH_OBSERVER(web_modal::ModalDialogHostObserver,
-                    observer_list_,
-                    OnHostDestroying());
+  for (auto& observer : observer_list_)
+    observer.OnHostDestroying();
 }
 
 void NativeAppWindowViews::OnWidgetVisibilityChanged(views::Widget* widget,
                                                      bool visible) {
   app_window_->OnNativeWindowChanged();
 }
 
 void NativeAppWindowViews::OnWidgetActivationChanged(views::Widget* widget,
                                                      bool active) {
   app_window_->OnNativeWindowChanged();
@@ skipping 147 matching lines @@
 
 bool NativeAppWindowViews::CanHaveAlphaEnabled() const {
   return widget_->IsTranslucentWindowOpacitySupported();
 }
 
 void NativeAppWindowViews::SetVisibleOnAllWorkspaces(bool always_visible) {
   widget_->SetVisibleOnAllWorkspaces(always_visible);
 }
 
 }  // namespace native_app_window